dy/dx=2xy+3xdy/dx=x(2y+3)dy/(2y+3)=xdx∫dy/(2y+3)=∫xdxln|2y+3|=x^2+C2y+3=Ce^(x^2)2y=Ce^(x^2)-3y=Ce^(x^2)-3/2，其中C是任意常数
